You can add notes to any type of node. These are very helpful to keep your module organised, especially when using Actions which perform complicated calculations, as you can use the 'Notes' field to describe what the node is doing.
In case of Transitions, you can add descriptions that will will override the generated default descriptions. This allows you to explain or summarize complicated transitional logic more clearly.
💡 Use notes to add the formula you are using in calculations or to leave remarks/to-dos for yourself or other collaborators.